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Instruction_Lookupswitch Class Reference

Inheritance diagram for Instruction_Lookupswitch:[legend]Collaboration diagram for Instruction_Lookupswitch:[legend]List of all members.

Public Methods
	Instruction_Lookupswitch ()
Instruction[]	branchpoints (Instruction next)
int	compile (byte bc[], int index)
int	nextOffset (int curr)
void	offsetToPointer (ByteCode bc)
int	parse (byte bc[], int index)
String	toString (cp_info constant_pool[])
Public Attributes
byte	pad
int	default_offset
int	npairs
int	match_offsets []
Instruction	default_inst
Instruction	match_insts []

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Detailed Description

Instruction subclasses are used to represent parsed bytecode; each bytecode operation has a corresponding subclass of Instruction.

Each subclass is derived from one of

• Instruction
• Instruction_noargs (an Instruction with no embedded arguments)
• Instruction_byte (an Instruction with a single byte data argument)
• Instruction_bytevar (a byte argument specifying a local variable)
• Instruction_byteindex (a byte argument specifying a constant pool index)
• Instruction_int (an Instruction with a single short data argument)
• Instruction_intvar (a short argument specifying a local variable)
• Instruction_intindex (a short argument specifying a constant pool index)
• Instruction_intbranch (a short argument specifying a code offset)
• Instruction_longbranch (an int argument specifying a code offset)

Author:

Clark Verbrugge

See also:

Instruction , Instruction_noargs , Instruction_byte , Instruction_bytevar , Instruction_byteindex , Instruction_int , Instruction_intvar , Instruction_intindex , Instruction_intbranch , Instruction_longbranch , Instruction_Unknown

Definition at line 138 of file Instruction_Lookupswitch.java.

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Member Function Documentation

Instruction [] Instruction_Lookupswitch::branchpoints (  Instruction   next )  [inline]

Returns an array of the instructions to which this instruction might branch (only valid if branches==true; default action is to return null). Parameters: next   the instruction following this one, in case of default flow through. Returns: array of instructions which may be targets of this instruction. See also: Instruction::branches Reimplemented from Instruction. Definition at line 146 of file Instruction_Lookupswitch.java.

int Instruction_Lookupswitch::compile (  byte   bc[], int   index )  [inline, virtual]

Writes out the sequence of bytecodes represented by this instruction, including any arguments. Parameters: bc   complete array of bytecode. index   offset of remaining bytecode at which to start writing. Returns: offset of the next available bytecode. See also: ClassFile::unparseMethod , Instruction::parse Reimplemented from Instruction. Definition at line 154 of file Instruction_Lookupswitch.java.

int Instruction_Lookupswitch::nextOffset (  int   curr )  [inline]

Returns the next available offset assuming this instruction begins on the indicated offset; default assumes no arguments. Parameters: curr   offset this instruction would be on. Returns: next available offset. See also: ClassFile::relabel Reimplemented from Instruction. Definition at line 174 of file Instruction_Lookupswitch.java.

void Instruction_Lookupswitch::offsetToPointer (  ByteCode   bc )  [inline]

Changes offset values in this instruction to Instruction references; default behaviour is to do nothing. Parameters: bc   complete array of bytecode. See also: ByteCode::build Reimplemented from Instruction. Definition at line 182 of file Instruction_Lookupswitch.java.

int Instruction_Lookupswitch::parse (  byte   bc[], int   index )  [inline, virtual]

Assuming the actual bytecode for this instruction has been extracted already, and index is the offset of the next byte, this method parses whatever arguments the instruction requires and return the offset of the next available byte. Parameters: bc   complete array of bytecode. index   offset of remaining bytecode after this instruction's bytecode was parsed. Returns: offset of the next available bytecode. See also: ByteCode::disassemble_bytecode , Instruction::compile Reimplemented from Instruction. Definition at line 203 of file Instruction_Lookupswitch.java.

String Instruction_Lookupswitch::toString (  cp_info   constant_pool[] )  [inline]

For displaying instructions. Parameters: constant_pool   constant pool of associated ClassFile Returns: String representation of this instruction. Reimplemented from Instruction. Definition at line 231 of file Instruction_Lookupswitch.java.

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The documentation for this class was generated from the following file:

• Instruction_Lookupswitch.java

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